@Henry Wood. I feel your pain, After 8 yrs of Browning M2 .50cal automatic firing. .50cal Barret sniper rifle firing and Remmington .308 sniper rifle firing in the US marines. Alot of it w/o hearing protection, such as during my 7 month vacation in Mogadishu Somalia, among other places, I only occasionally get ringing in my ears as i'm trying to fall asleep.
May you find restful nights my friend
Semper Fidelis.